radiation
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Antennas : 15M- The extended double zepp
- This wire antenna exhibits extraordinarily high gain in a bi directional radiation pattern.
[ Hits: 12405 | Votes: 28 | Rating: 8.11 ]
- 21 mhz half wave GP Antenna
- 21 mhz half wave ant -very low radiation angle - full size and light weight- all coax matching system - decoupling care to prevent low angle radiation degrade
[ Hits: 3102 | Votes: 6 | Rating: 2.17 ]
- 20m delta loop
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- This antenna is fed for vertical polarisation, to give a low angle of radiation for DX and also a nearly omni-directional radiation pattern.
[ Hits: 65707 | Votes: 69 | Rating: 6.71 ]
- 80M Vertical antenna with capacitance hat
- Simple wire antenna cheap to make, using readily available materials, Low angle radiation, with rejection of high angle signals Wide bandwidth, with resonance at the 80M DX window (3.790-3.800 MHz); and Maximum height is 40 feet
[ Hits: 25084 | Votes: 23 | Rating: 7.05 ]
- Building an own Stackmatch
- Nowdays lots of people are putting up antennas to either beam in different directions at the same time or just to stack them and get a lower angle of radiation. Use this stackmatch to match you array.
[ Hits: 1619 | Votes: 1 | Rating: 8 ]
- W8JI Technical pages
- Amplifier, vacuum tube, receiving beverage loop vertical and transmitting antenna system technical information radiation resistance, EH antenna, noise,receivers, and information on keyclicks.
[ Hits: 22138 | Votes: 37 | Rating: 8.3 ]
- Detuning Towers
- The goal of detuning is not to avoid resonance, but rather to minimize re-radiation and/or current in the interfering structure.
[ Hits: 815 | Votes: 1 | Rating: 10 ]
- G5RV All-Band HF Antenna
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- About G5RV antennas, with radiation pattern produced with eznec
[ Hits: 29619 | Votes: 13 | Rating: 4.54 ]
- Cubic Quad
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- The cubic quad is a very popular way to get reasonably high gain and excellent front to back ratios as well as low angles of radiation for without going to extreme heights. Includes design for 2 6 10 12 15 meter bands
[ Hits: 68047 | Votes: 64 | Rating: 5.08 ]
- Rhombic Antenna for Shortwave Radio Broadcasting
- Rhombic antenna for shortwave radio broadcasting, general description and radiation patterns
[ Hits: 2804 | Votes: 1 | Rating: 10 ]
- Small antennas and radiation resistance
- Small antenna, what causes loss and how to increase radiation resistance in small antennas., A description of loss and radiation resistance.
[ Hits: 883 | Votes: 0 | Rating: 0 ]
- Antenna Height Theory
- Antenna mounting height, the higher the better? Learn how radiation pattern change, and decide if you need an higher or a lower angle for your dx needs.
[ Hits: 1877 | Votes: 5 | Rating: 7.2 ]
- Radiation and fields
- Electric Fields, magnetic fields, electromagnetic fields, losses, fresnel zone, nearfield and farfield
[ Hits: 446 | Votes: 1 | Rating: 10 ]
- DK7ZB 144 mhz Yagis
- High gain, good pattern and acceptable bandwidth. These aims can be realized with a radiation-resistance of 25-35Ohms, because the 28-Ohm-feedpoint is very simple to match.
[ Hits: 1908 | Votes: 7 | Rating: 6.86 ]
- 408 MHz Survey
- Survey of galactic synchrotron radiation at 408 MHz in the south of England using a 10 metre dish and a Dicke radiometer
[ Hits: 2776 | Votes: 2 | Rating: 8.5 ]
- Troposcatter Meteorscatter Ionoscatter
- Troposcatter, 50 MHz meteor scatter, ground gain for eme, radiation angle, by OZ1RH
[ Hits: 845 | Votes: 4 | Rating: 6.5 ]
- NovaLynx Corporation
- "Instruments & Systems for Weather & Water Monitoring; weather stations, wind alarms, sensors for wind speed, wind direction, precipitation, temperature, relative humidity, barometric pressure, solar radiation, evaporation, rain & snow gauges, lightning detection."
[ Hits: 669 | Votes: 3 | Rating: 10 ]
- Yagi Designer
- Program that produces antenna radiation patterns and graphs for SWR, forward gain, and F/B ratios
[ Hits: 22763 | Votes: 63 | Rating: 6.38 ]
- 4NEC2 antenna modeler
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- 4nec2 is a completely free Nec2, Nec4 and windows based tool for creating, viewing, optimizing and checking 2D and 3D style antenna geometry structures and generate, display and/or compare near/far-field radiation patterns for both the starting and experienced antenna modeler.
Can be interfaced to HFwin32 propagation prediction software.
[ Hits: 30094 | Votes: 131 | Rating: 7.32 ]
- Electromagnetic Radiation Explained
- by Jim Hawkins - WA2WHV How Radio Waves Are Born
[ Hits: 1046 | Votes: 2 | Rating: 6 ]
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